Save tokens locally for use across runs
Store tokens in a local config file avoiding any refresh delay unless necessary when the current access token expires. Summary: - move draft main routine into the `brokers` package mod - start an api wrapper type - always write the current access tokens to the config on teardownkivy_mainline_and_py3.8
Tyler Goodlet
parent
e312fb6525
commit
570d879146
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@ -0,0 +1,27 @@
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"""
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Broker client-daemons and general back end machinery.
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"""
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import sys
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import trio
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from .questrade import serve_forever
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from ..log import get_console_log
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def main() -> None:
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log = get_console_log('INFO', name='questrade')
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argv = sys.argv[1:]
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refresh_token = None
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if argv:
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refresh_token = argv[0]
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# main loop
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try:
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client = trio.run(serve_forever, refresh_token)
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except Exception as err:
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log.exception(err)
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else:
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log.info(
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f"\nLast refresh_token: {client.access_data['refresh_token']}\n"
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f"Last access_token: {client.access_data['access_token']}\n"
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)
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@ -1,11 +1,11 @@
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"""
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Questrade API backend.
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"""
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# from ..config import load
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from ..log import get_logger, get_console_log
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from . import config
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from ..log import get_logger
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from pprint import pformat
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import sys
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import trio
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import time
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from async_generator import asynccontextmanager
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# TODO: move to urllib3/requests once supported
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import asks
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@ -13,105 +13,174 @@ asks.init('trio')
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log = get_logger('questrade')
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_refresh_token_ep = 'https://login.questrade.com/oauth2/token'
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_refresh_token_ep = 'https://login.questrade.com/oauth2/'
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_version = 'v1'
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class ResponseError(Exception):
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class QuestradeError(Exception):
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"Non-200 OK response code"
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def err_on_status(resp: asks.response_objects.Response) -> None:
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def resproc(
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resp: asks.response_objects.Response,
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return_json: bool = True
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) -> asks.response_objects.Response:
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"""Raise error on non-200 OK response.
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"""
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data = resp.json()
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log.debug(f"Received json contents:\n{pformat(data)}\n")
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if not resp.status_code == 200:
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raise ResponseError(resp.body)
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raise QuestradeError(resp.body)
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return data if return_json else resp
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class API:
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"""Questrade API at its finest.
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"""
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def __init__(self, session: asks.Session):
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self._sess = session
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async def _request(self, path: str) -> dict:
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resp = await self._sess.get(path=f'/{path}')
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return resproc(resp)
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async def accounts(self):
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return await self._request('accounts')
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async def time(self):
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return await self._request('time')
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class Client:
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"""API client suitable for use as a long running broker daemon.
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"""
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def __init__(self, refresh_token: str):
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self._sess = asks.Session()
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self.data = {'refresh_token': refresh_token}
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self.refresh_token = refresh_token
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def __init__(self, config: dict):
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sess = self._sess = asks.Session()
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self.api = API(sess)
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self.access_data = config
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self.user_data = {}
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self._conf = None # possibly set in ``from_config`` factory
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@classmethod
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async def from_token(cls, refresh_token: str):
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client = cls(refresh_token)
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await client.refresh_access()
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async def from_config(cls, config):
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client = cls(dict(config['questrade']))
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client._conf = config
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await client.enable_access()
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return client
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async def refresh_access(self) -> None:
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"""Acquire new ``refresh_token`` and ``access_token`` if necessary.
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async def _new_auth_token(self) -> dict:
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"""Request a new api authorization ``refresh_token``.
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"""
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resp = await self._sess.get(
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_refresh_token_ep,
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params={'grant_type': 'refresh_token',
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'refresh_token': self.data['refresh_token']}
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)
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err_on_status(resp)
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data = resp.json()
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self.data.update(data)
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# set auth token for the session
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self._sess.headers.update(
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{'Authorization': f"{data['token_type']} {data['access_token']}"}
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)
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# set base API url (asks shorthand)
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self._sess.base_location = data['api_server'] + _version
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async def get_user_data(self) -> dict:
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"""Get and store user data from the ``accounts`` endpoint.
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"""
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resp = await self._sess.get(path='/accounts')
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err_on_status(resp)
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data = resp.json()
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self.data.update(data)
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return data
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async def get_client(refresh_token: str = None) -> Client:
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"""Gain api access using a user generated token.
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See the instructions::
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Gain api access using either a user provided or existing token.
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See the instructions::
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http://www.questrade.com/api/documentation/getting-started
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"""
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if refresh_token is None:
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# sanitize?
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refresh_token = input(
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"Questrade access token:")
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http://www.questrade.com/api/documentation/security
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"""
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resp = await self._sess.get(
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_refresh_token_ep + 'token',
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params={'grant_type': 'refresh_token',
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'refresh_token': self.access_data['refresh_token']}
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)
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data = resproc(resp)
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self.access_data.update(data)
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log.info("Waiting for initial API access...")
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return await Client.from_token(refresh_token)
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return data
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async def _prep_sess(self) -> None:
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"""Fill http session with auth headers and a base url.
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"""
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data = self.access_data
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# set access token header for the session
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self._sess.headers.update({
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'Authorization': (f"{data['token_type']} {data['access_token']}")})
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# set base API url (asks shorthand)
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self._sess.base_location = self.access_data['api_server'] + _version
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async def _revoke_auth_token(self) -> None:
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"""Revoke api access for the current token.
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"""
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token = self.access_data['refresh_token']
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log.debug(f"Revoking token {token}")
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resp = await asks.post(
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_refresh_token_ep + 'revoke',
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headers={'token': token}
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)
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return resp
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async def enable_access(self, force_refresh: bool = False) -> dict:
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"""Acquire new ``refresh_token`` and/or ``access_token`` if necessary.
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Only needs to be called if the locally stored ``refresh_token`` has
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expired (normally has a lifetime of 3 days). If ``false is set then
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refresh the access token instead of using the locally cached version.
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"""
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access_token = self.access_data.get('access_token')
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expires = float(self.access_data.get('expires_at', 0))
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# expired_by = time.time() - float(self.ttl or 0)
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# if not access_token or (self.ttl is None) or (expires < time.time()):
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if not access_token or (expires < time.time()) or force_refresh:
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log.info(
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f"Access token {access_token} expired @ {expires}, "
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"refreshing...")
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data = await self._new_auth_token()
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# store absolute token expiry time
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self.access_data['expires_at'] = time.time() + float(
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data['expires_in'])
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await self._prep_sess()
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return self.access_data
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def get_config() -> "configparser.ConfigParser":
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conf, path = config.load()
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if not conf.has_section('questrade') or (
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not conf['questrade'].get('refresh_token')
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):
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log.warn(
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f"No valid `questrade` refresh token could be found in {path}")
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# get from user
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refresh_token = input("Please provide your Questrade access token: ")
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conf['questrade'] = {'refresh_token': refresh_token}
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return conf
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@asynccontextmanager
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async def get_client(refresh_token: str = None) -> Client:
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"""Spawn a broker client.
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"""
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conf = get_config()
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log.debug(f"Loaded questrade config: {conf['questrade']}")
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log.info("Waiting on api access...")
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client = await Client.from_config(conf)
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try:
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try: # do a test ping to ensure the access token works
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log.debug("Check time to ensure access token is valid")
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await client.api.time()
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except Exception as err:
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# access token is likely no good
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log.warn(f"Access token {client.access_data['access_token']} seems"
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f" expired, forcing refresh")
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await client.enable_access(force_refresh=True)
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await client.api.time()
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yield client
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finally:
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# save access creds for next run
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conf['questrade'] = client.access_data
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config.write(conf)
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async def serve_forever(refresh_token: str = None) -> None:
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"""Start up a client and serve until terminated.
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"""
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client = await get_client(refresh_token=refresh_token)
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data = await client.get_user_data()
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log.info(pformat(data))
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return client
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def main() -> None:
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log = get_console_log('INFO', name='questrade')
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argv = sys.argv[1:]
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refresh_token = None
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if argv:
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refresh_token = argv[0]
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# main loop
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try:
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client = trio.run(serve_forever, refresh_token)
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except Exception as err:
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log.exception(err)
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else:
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log.info(
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f"\nLast refresh_token: {client.data['refresh_token']}\n"
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f"Last access_token: {client.data['access_token']}"
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)
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async with get_client(refresh_token) as client:
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# pretty sure this doesn't work
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# await client._revoke_auth_token()
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return client
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